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Finding the Fourth Proportional to 393,646.95, 590,564.16 and 127,407.47

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Solution

The fourth proportional to 393,646.95, 590,564.16 and 127,407.47 is: 191,141.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,646.95 : 590,564.16 = 127,407.47 : x
  2. Step 2: Convert to fraction form
    393,646.95/590,564.16 = 127,407.47/x
  3. Step 3: Cross multiply
    393,646.95x = 590,564.16 × 127,407.47
  4. Step 4: Simplify right side
    393,646.95x = 75,242,282,545.45
  5. Step 5: Solve for x
    x = 75,242,282,545.45/393,646.95
  6. Step 6: Final answer
    x = 191,141.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.